FuzzyLogger

"for any given month, i want to track many things e.g. my fuel cost, my groceries expenses; but for any given thing, i would like to track it for each month too."

"for any given student, i should keep a record of his results in all tests; but for any given test, i should know the result of every student too."

FuzzyLogger is an app that can help you record these types of data, and it allows you to freely pick which criterion to start with when entering any given entry.